The invention discloses a method for identifying sodium carbonate and sodium bicarbonate solution through chromotropic acid 2R-alcoholic solution. The method comprises the following steps: taking two small test tubes and respectively adding 2ml sodium carbonate and sodium bicarbonate solution; mixing chromotropic acid 2R with alcoholic solution with 20% of volume percent concentration of ethyl alcohol, thereby acquiring the red chromotropic acid 2R-alcoholic solution in which the volume ratio of chromotropic acid 2R to alcoholic solution is 0.0025%; respectively adding 1 drop of chromotropic acid 2R-alcoholic solution into the two small test tubes, wherein the red chromotropic acid 2R-alcoholic solution is faded to be colorless under the effect of the sodium carbonate solution, but the solution cannot be faded under the effect of the sodium bicarbonate solution and still is in original red color of the chromotropic acid 2R-alcoholic solution. According to the method provided by the invention, the problem of quickly identifying the sodium carbonate solution and the sodium bicarbonate solution which are both colorless and transparent can be effectively solved; better service can be supplied for production, life, scientific research and teaching; the device is simple; the operation is convenient; the drugs can be easily acquired; the phenomenon is obvious; the effect is good.